I really liked this game. The freezing HUD was really, really cool. I actually liked the lack of music (I'm weird). It emphasized the feeling of emptiness and that oh-no feeling you get when your car breaks down (the radio dies).
I am really glad about the level of mining. It was just about perfect. I didn't realize that you put crystals in one at a time, and thought it automatically deposited them all, so when I first checked the levels and saw 10%, I freaked out a little. Flashbacks from runescape and final fantasy power grinding came to mind.